I agree with SI.
Having had a great 3 years at Flybe I do not regret the switch. There are many eJ bashers within the company and things are not perfect but loco is the way of the future and those of us within the company have to work hard to put right those things that adversly effect us.
The training is good, the type rating very good, however, the T&Cs are becoming variable as more schemes such as TRSS become the 'norm'. The big difference is the leap in the standards expected on the flight deck. SOPs are very standard for good reason, there are many mother tongues within the company so only standard patter will do, tedious but essential.
You are right that there is no interline travel arrangement but you do get confirmed eJ travel and if like me you can only take holidays during the school breaks then standby travel can be a bit stressful when going on your main holiday when there are so few seats left on the popular destinations, I rather use some of the £15k of extra pay I get now to buy confirmed seats.
As for basing it certainly is unacceptable the way eJ expect you to enter the location lottery but there is so much movement in the company that it is likely that by the time you are checked to line you will have got the base of your choise.
You have to weigh up the likelyhood of further progression within Flybe including fleet change to the certainty of a 737/319 rating. From what I hear you will not work any harder or have more disruption that at Flybe. If after a couple of years you want to move on then you have a solid rating behind you, it maybe more difficult to move on with just 146 experience.
That is it for what it is worth.
Good Luck
